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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 9 Node Reference
9.5.3 Terminal Node Fiber-Optic Cabling
9.5.3 Terminal Node Fiber-Optic Cabling
The following rules generally apply to terminal node cabling:
• A terminal site has only one side (as compared to a hub node, which has two sides). The terminal
side can be either Side B or Side A.
• The terminal side OPT-BST or OSC-CSM card COM TX port is connected to the terminal side
OPT-PRE COM RX port or the 32DMX-O/40-DMX-C/40-DMX-CE COM RX port.
• The terminal side OPT-PRE COM TX port is connected to the terminal side
32DMX-O/40-DMX-C/40-DMX-CE COM RX port.
• The terminal side 32MUX-O/40-MUX-C COM TX port is connected to the terminal side OPT-BST
or OSC-CSM COM RX port.
9.5.4 Line Amplifier Node Fiber-Optic Cabling
The following rules generally apply to line amplifier node cabling:
• The line amplifier node layout allows all combinations of OPT-PRE and OPT-BST cards and allows
you to use asymmetrical card choices in Side A-to-Side B and Side B-to-Side A configurations. For
a given line direction, you can configure the four following possibilities:
–
Only preamplification (OPT-PRE)
–
Only booster amplification (OPT-BST)
–
Both preamplification and booster amplification (where a line amplifier node has amplification
in at least one direction)
–
Neither preamplification nor booster amplification
• If a Side A OPT-PRE card is installed:
–
The Side A OSC-CSM or OPT-BST COM TX is connected to the Side A OPT-PRE COM RX
port.
–
The Side A OPT-PRE COM TX port is connected to the Side B OSC-CSM or OPT-BST COM
RX port.
• If a Side A OPT-PRE card is not installed, the Side A OSC-CSM or OPT-BST COM TX port is
connected to the Side B OSC-CSM or OPT-BST COM RX port.
• If an Side B OPT-PRE card is installed:
–
The Side B OSC-CSM or OPT-BST COM TX port is connected to the Side B OPT-PRE COM
RX port.
3 Side A OPT-BST COM TX to Side A OPT-PRE
COM RX
8 Side B OPT-PRE COM RX to Side B OPT-BST COM
TX
4 Side A OPT-BST COM RX to Side A 32MUX-O
COM TX
9 Side B DCU TX to Side B OPT-PRE DC RX
1
5 Side A OPT-PRE COM TX to Side A 32DMX-O
COM RX
10 Side B DCU RX to Side B OPT-PRE DC TX
1
1. If a DCU is not installed, a 4-dB attenuator loop, +/– 1 dB must be installed between the OPT-PRE DC ports.
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